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Phosphorylated insulin like growth factor

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https://www.readbyqxmd.com/read/29763915/serum-from-chronic-hepatitis-b-patients-promotes-growth-and-proliferation-via-the-igf-ii-igf-ir-mek-erk-signaling-pathway-in-hepatocellular-carcinoma-cells
#1
Yuanyuan Ji, Zhidong Wang, Haiyan Chen, Lei Zhang, Fei Zhuo, Qingqing Yang
BACKGROUND/AIMS: Chronic hepatitis B virus (HBV) infection (CHB) plays a central role in the etiology of hepatocellular carcinoma (HCC). Emerging evidence implicates insulin-like growth factor (IGF)-II as a major risk factor for the growth and development of HCC. However, the relationship between HBV infection and IGF-II functions remains to be elucidated. METHODS: Levels of circulating IGF-II and IGF-I receptor (IGF-IR) in healthy donors (HDs) and CHB patients were tested by ELISA...
May 9, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29758070/rapamycin-independent-igf2-expression-in-tsc2-null-mouse-embryo-fibroblasts-and-human-lymphangioleiomyomatosis-cells
#2
Blanca E Himes, Kseniya Obraztsova, Lurong Lian, Maya Shumyatcher, Ryan Rue, Elena N Atochina-Vasserman, Stella K Hur, Marisa S Bartolomei, Jilly F Evans, Vera P Krymskaya
Lymphangioleiomyomatosis (LAM) is a rare, almost exclusively female lung disease linked to inactivating mutations in tuberous sclerosis complex 2 (TSC2), a tumor suppressor gene that controls cell metabolic state and growth via regulation of the mechanistic target of rapamycin (mTORC1) signaling. mTORC1 is frequently activated in human cancers and, although the mTORC1 inhibitor rapamycin has a cytostatic effect, it is, in general, unable to elicit a robust curative effect or tumor regression. Using RNA-Seq, we identified (1) Insulin-like Growth Factor (IGF2) as one of the genes with the highest fold-change difference between human TSC2-null and TSC2-expressing angiomyolipoma cells from a patient with LAM, and (2) the mouse IGF2 homolog Igf2, as a top-ranking gene according to fold change between Tsc2-/- and Tsc2+/+ mouse embryo fibroblasts (MEFs)...
2018: PloS One
https://www.readbyqxmd.com/read/29743626/role-of-igf-1r-in-ameliorating-apoptosis-of-gne-deficient-cells
#3
Reema Singh, Priyanka Chaudhary, Ranjana Arya
Sialic acids (SAs) are nine carbon acidic amino sugars, found at the outermost termini of glycoconjugates performing various physiological and pathological functions. SA synthesis is regulated by UDP-GlcNAc 2-epimerase/ManNAc kinase (GNE) that catalyzes rate limiting steps. Mutations in GNE result in rare genetic disorders, GNE myopathy and Sialuria. Recent studies indicate an alternate role of GNE in cell apoptosis and adhesion, besides SA biosynthesis. In the present study, using a HEK cell-based model for GNE myopathy, the role of Insulin-like Growth Factor Receptor (IGF-1R) as cell survival receptor protein was studied to counter the apoptotic effect of non-functional GNE...
May 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29731870/igf-1-induced-mmp-11-expression-promotes-the-proliferation-and-invasion-of-gastric-cancer-cells-through-the-jak1-stat3-signaling-pathway
#4
Chao Su, Wenchang Wang, Cunchuan Wang
The present study aimed to investigate the association between insulin-like growth factor-1 (IGF-1) and matrix metalloproteinase-11 (MMP-11) expression in gastric cancer (GC) and the underlying mechanisms in SGC-7901 cells. Reverse transcription-quantitative polymerase chain reaction analysis revealed that the expression of IGF-1 and MMP-11 was significantly upregulated in GC tissues compared with normal gastric tissue. Furthermore, IGF-1 significantly and dose-dependently promoted MMP-11. Western blotting revealed that the addition of IGF-1 to SGC-7901 cells led to an evident enhancement in signal transducer and activator of transcription 3 (STAT3), IGF-1R and Janus kinase 1 (JAK1) phosphorylation at 20 and 40 min...
May 2018: Oncology Letters
https://www.readbyqxmd.com/read/29725374/decreased-expression-of-microrna-223-promotes-cell-proliferation-in-hepatocellular-carcinoma-cells-via-the-insulin-like-growth-factor-1-signaling-pathway
#5
Cheng Zhang, Jiamin Zhang
Hepatocellular carcinoma (HCC) is one of the most harmful types of cancer. Previous studies have demonstrated that microRNA (miR)-223 is downregulated in the serum and tumor tissue of patients with HCC. The present study aimed to investigate the regulatory role of miR-223 on insulin-like growth factor-1 receptor (IGF-1R) and downstream factors in HCC. The Hep3B cell line was transfected with miR-223 mimic and inhibitor. Following transfection, cell proliferation was analyzed using a cell counting kit 8 assay and cellular apoptosis was assessed using flow cytometry...
May 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29721854/abscisic-acid-supplementation-rescues-high-fat-diet-induced-alterations-in-hippocampal-inflammation-and-irss-expression
#6
Alberto Ribes-Navarro, Mariam Atef, Sandra Sánchez-Sarasúa, María Teresa Beltrán-Bretones, Francisco Olucha-Bordonau, Ana María Sánchez-Pérez
Accumulated evidence indicates that neuroinflammation induces insulin resistance in the brain. Moreover, both processes are intimately linked to neurodegenerative disorders, including Alzheimer's disease. Potential mechanisms underlying insulin resistance include serine phosphorylation of the insulin receptor substrate (IRS) or insulin receptor (IR) misallocation. However, only a few studies have focused on IRS expression in the brain and its modulation in neuroinflammatory processes. This study used the high-fat diet (HFD) model of neuroinflammation to study the alterations of IR, an insulin-like growth factor receptor (IGF1R) and IRS expressions in the hippocampus...
May 2, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29718759/increased-insulin-like-growth-factor-binding-protein-1-phosphorylation-in-decidualized-stromal-mesenchymal-cells-in-human-intrauterine-growth-restriction-placentas
#7
Sahil S Singal, Karen Nygard, Robert Gratton, Thomas Jansson, Madhulika B Gupta
Intrauterine growth restriction (IUGR) is often caused by placental insufficiency, which is believed to be associated with decreased delivery of oxygen and nutrients to the placental barrier. We recently reported that hypoxia and/or leucine deprivation triggered hyperphosphorylation of insulin-like growth factor binding protein-1 (IGFBP-1) in decidualized human immortalized endometrial stromal cells (HIESCs), resulting in decreased insulin-like growth factor-1 (IGF-1) bioactivity. To test the hypothesis that human IUGR is associated with increased decidual IGFBP-1 phosphorylation at discrete sites, we used IUGR and gestational age matched appropriate for gestational age (AGA) placentas ( n=5 each)...
May 1, 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29712908/the-novel-hsa-mir-12528-regulates-tumourigenesis-and-metastasis-through-hypo-phosphorylation-of-akt-cascade-by-targeting-igf-1r-in-human-lung-cancer
#8
Seong Ho Jeon, Jung Ki Yoo, Chang Min Kim, Eun Su Lim, So Jeong Lee, Ji Min Lee, Seung-Hun Oh, Jin Kyeoung Kim
Lung cancer cases are increasing yearly; however, few novel therapeutic strategies for treating this disease have been developed. Here the dysregulation between microRNAs and oncogenes or tumour-suppressor genes forms a close connection-loop to the development or progression in human lung carcinogenesis. That is, the relationship between microRNAs and carcinogenic mechanism may find the critical clue to improve the treatment efficacy. Accordingly, we identified and characterised a novel microRNA, hsa-miR-12528, in A549 cells...
May 1, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29678421/growth-hormone-receptor-deficient-pigs-resemble-the-pathophysiology-of-human-laron-syndrome-and-reveal-altered-activation-of-signaling-cascades-in-the-liver
#9
Arne Hinrichs, Barbara Kessler, Mayuko Kurome, Andreas Blutke, Elisabeth Kemter, Maren Bernau, Armin M Scholz, Birgit Rathkolb, Simone Renner, Sebastian Bultmann, Heinrich Leonhardt, Martin Hrabĕ de Angelis, Hiroshi Nagashima, Andreas Hoeflich, Werner F Blum, Martin Bidlingmaier, Rüdiger Wanke, Maik Dahlhoff, Eckhard Wolf
OBJECTIVE: Laron syndrome (LS) is a rare, autosomal recessive disorder in humans caused by loss-of-function mutations of the growth hormone receptor (GHR) gene. To establish a large animal model for LS, pigs with GHR knockout (KO) mutations were generated and characterized. METHODS: CRISPR/Cas9 technology was applied to mutate exon 3 of the GHR gene in porcine zygotes. Two heterozygous founder sows with a 1-bp or 7-bp insertion in GHR exon 3 were obtained, and their heterozygous F1 offspring were intercrossed to produce GHR-KO, heterozygous GHR mutant, and wild-type pigs...
March 15, 2018: Molecular Metabolism
https://www.readbyqxmd.com/read/29642855/mir-30a-5p-confers-cisplatin-resistance-by-regulating-igf1r-expression-in-melanoma-cells
#10
Yuxia Li, Jie Zhang, Yajing Liu, Bingyue Zhang, Fubo Zhong, Shubin Wang, Zhengyu Fang
BACKGROUND: Melanoma is notoriously resistant to all current modalities of cancer therapies including chemotherapy. In recent years, microRNAs (miRNAs) have emerged as molecular regulators in the development and progression of melanoma. However, the relationship between microRNA and chemo-resistance of melanoma is little known. In present study, we aimed to investigate the miRNAs related to cisplatin-resistance in melanoma cells. METHODS: After cisplatin (DDP) resistant melanoma cells (M8/DDP and SK-Mel-19/DDP) were established in-vitro, high-throughput screening of differentially expressed miRNAs between resistant cells and parental cells were performed...
April 11, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29621055/linc00673-silencing-inhibits-cell-migration-and-invasion-by-suppressing-pi3k-akt-signaling-in-glioma
#11
Feng Zhang, Yuen Huang, Bata Wang, Cheng Zhong, Xiaofeng Liu, Shanshan Ding
LINC00673 is an oncogene that plays a key role in various cancer types. However, the role of LINC00673 in glioma remains unclear. In this study, we examined its expression in glioma cells by quantitative real-time PCR and found higher expression of LINC00673 in glioma cells compared with that in normal human astrocytes. Furthermore, LINC00673 silencing inhibited the migration and invasion of U87MG and U118MG cells, phosphoinositide 3-kinase (PI3K) expression, and AKT phosphorylation. Moreover, activation of the PI3K/AKT signaling pathway by insulin-like Growth factor-1 abolished the inhibitory effect of LINC00673 silencing on the migration and invasion of U87MG and U118MG cells...
April 4, 2018: Neuroreport
https://www.readbyqxmd.com/read/29620219/anthricin%C3%A2-induced-caspase%C3%A2-dependent-apoptosis-through-igf1r-pi3k-akt-pathway-inhibition-in-a549-human-non%C3%A2-small-lung-cancer-cells
#12
Bo-Ram Park, Seul Ah Lee, Sung Min Moon, Chun Sung Kim
Anthricin (deoxypodophyllotoxin) is a major lignan in Anthriscus sylvestris and possesses many bioactivities such as antiproliferative, antitumor, anti‑platelet aggregation, antiviral and anti‑inflammatory actions. However, the anticancer effects of anthricin on A549 human non‑small cell lung cancer cells and potential molecular mechanisms remain unknown. Therefore, we investigated the anticancer effect of anthricin and the underlying mechanism in A549 cells. Anthricin (10‑200 nM) inhibited the viability of A549 cells in a dose‑ and time‑dependent manner...
March 27, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29611103/evidence-for-compromised-insulin-signaling-and-neuronal-vulnerability-in-experimental-model-of-sporadic-alzheimer-s-disease
#13
Smriti Gupta, Kamalendra Yadav, Shrikant S Mantri, Nitin K Singhal, Subramaniam Ganesh, Rajat Sandhir
Evidence from animal studies categorizes sporadic Alzheimer's disease (sAD) as a metabolic syndrome with accompanying cognitive deficits. Given that glial cells act as "silent partners" to neurons by providing trophic support and defense, the present study investigated the role of glia in sAD pathology. A streptozotocin (STZ)-induced glial-neuronal co-culture model of sAD was used to study the metabolic status of the two cell types. Real time RT-PCR and Western blotting results indicated that amyloid precursor protein (APP) and β-secretase (BACE1) were highly expressed in co-cultured neurons than in monocultures...
April 3, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29599831/effect-of-curcumin-on-vascular-endothelial-growth-factor-in-hypoxic-hepg2-cells-via-the-insulin-like-growth-factor-1-receptor-signaling-pathway
#14
Yihui Chen, Wei Zhong, Baohua Chen, Chuanyu Yang, Song Zhou, Jing Liu
To investigate the anti-angiogenic effect and underlying molecular mechanisms of curcumin on HepG2 cells under hypoxic conditions, insulin-like growth factor 1 receptor (IGF-1R) knockout HepG2 cells were constructed using a clustered regularly interspaced short palindromic repeats/Cas9 genome-editing system. Hypoxic conditions were generated using cobalt chloride (CoCl2 ). An MTT assay was performed to measure the effects of curcumin on cell viability in hypoxia-induced IGF-1R knockout HepG2 cells, while western blot analysis was used to detect the expression of IGF-1R, phosphorylated (p)-protein kinase B (Akt), p-extracellular signal-regulated kinases (Erk)1/2, hypoxia-inducible factor-1α (HIF-1α) and vascular endothelial growth factor (VEGF)...
March 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29572229/the-mda-9-syntenin-igf-1r-stat3-axis-directs-prostate-cancer-invasion
#15
Swadesh K Das, Anjan K Pradhan, Praveen Bhoopathi, Sarmistha Talukdar, Xue-Ning Shen, Devanand Sarkar, Luni Emdad, Paul B Fisher
Although prostate cancer (PCa) is clinically manageable during several stages of progression, survival is severely compromised once cells invade and metastasize to distant organs. Comprehending the pathobiology of invasion is required for developing efficacious targeted therapies against metastasis. Based on bioinformatics data, we predicted an association of melanoma differentiation associated gene-9 (syntenin, or syndecan binding protein (SDCBP)) in PCa progression. Using tissue samples from various Gleason stage PCa patients with adjacent normal tissue, a series of normal prostate and PCa cell lines (with differing tumorigenic/metastatic properties), mda-9/syntenin manipulated variants (including loss-of-function and gain-of-function cell lines), and CRISPR/Cas9 stable MDA-9/syntenin knockout cells, we now confirm the relevance of and dependence on MDA-9/syntenin in PCa invasion...
March 23, 2018: Cancer Research
https://www.readbyqxmd.com/read/29568964/disruption-of-igf%C3%A2-1r-signaling-by-a-novel-quinazoline-derivative-hmj%C3%A2-30-inhibits-invasiveness-and-reverses-epithelial-mesenchymal-transition-in-osteosarcoma-u%C3%A2-2-os-cells
#16
Yu-Jen Chiu, Mann-Jen Hour, Yi-An Jin, Chi-Cheng Lu, Fuu-Jen Tsai, Tai-Lin Chen, Hsu Ma, Yu-Ning Juan, Jai-Sing Yang
Osteosarcoma is the most common primary malignancy of the bone and is characterized by local invasion and distant metastasis. Over the past 20 years, long-term outcomes have reached a plateau even with aggressive therapy. Overexpression of insulin-like growth factor 1 receptor (IGF‑1R) is associated with tumor proliferation, invasion and migration in osteosarcoma. In the present study, our group developed a novel quinazoline derivative, 6-fluoro‑2-(3-fluorophenyl)-4-(cyanoanilino)quinazoline (HMJ‑30), in order to disrupt IGF‑1R signaling and tumor invasiveness in osteosarcoma U‑2 OS cells...
March 16, 2018: International Journal of Oncology
https://www.readbyqxmd.com/read/29568075/inhibition-of-endothelial-nitric-oxide-synthase-reverses-the-effect-of-exercise-on-improving-cognitive-function-in-hypertensive-rats
#17
Liying Zhang, Haiqing Zheng, Jing Luo, Lili Li, Xiaona Pan, Ting Jiang, Chongjun Xiao, Zhong Pei, Xiquan Hu
Hypertension-induced endothelial dysfunction is associated with β-amyloid (Aβ) deposition, a typical pathology of Alzheimer's disease (AD). Endothelial nitric oxide synthase (eNOS) phosphorylation, impaired by phosphatidylinositol 3-kinase (PI3K)/protein kinase-B(Akt) pathway abnormalities in hypertensive rats, has a critical role in endothelial function. However, it is unknown whether eNOS participates in the hypertension-induced pathology of AD. In this study, we investigated the role of eNOS in Aβ deposition and cognitive function in stroke-prone spontaneously hypertensive (SHRSP) rats...
March 22, 2018: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/29562399/-changes-of-insulin-like-growth-factor-1-axis-in-chronic-kidney-disease-and-its-role-in-skeletal-muscle-atrophy
#18
L J Gu, Y Y Zhang, L Wang, J L Wang, X Wang, W J Yuan
Objective: To investigate the changes of insulin-like growth factor 1 (IGF-1) axis in chronic kidney disease (CKD) and its role in skeletal muscle atrophy. Methods: A total of 240 patients with CKD stage 1-5 (without dialysis treatment) were included between August 2016 and February 2017. Serum IGF-1 and IGF-1 binding protein-3 (IGFBP-3) were measured using chemiluminescence, and the influencing factors of serum IGF-1 and IGFBP-3 were analyzed. Besides, male Sprague-Dawley rats (200-250 g) were randomly assigned to the sham-operated control group (Control, n =15) and the 5/6 nephrectomy group ( n =15) as CKD animal model...
March 13, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29553841/cervical-biomarkers-as-predictors-of-successful-induction-of-labour-by-foley-catheter
#19
Heidi Kruit, Oskari Heikinheimo, Timo Sorsa, Juuso Juhila, Jorma Paavonen, Leena Rahkonen
The prediction of successful labour induction is difficult, indicating a need for a biomarker test. Little is known about the effect of Foley catheter (FC) induction on biochemical mediators in the cervix, such as the insulin-like growth factor binding protein-1 (IGFBP-1), matrix metalloproteinases (MMP) and their inhibitors (TIMP). We enrolled 35 nulliparous women with singleton pregnancies, intact amniotic membranes and cephalic presentation ≥40 gestational weeks scheduled for labour induction by FC. Serial cervical swab samples were collected at FC insertion and expulsion...
March 19, 2018: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29549161/dual-inhibition-of-igf-1r-and-erbb3-enhances-the-activity-of-gemcitabine-and-nab-paclitaxel-in-preclinical-models-of-pancreatic-cancer
#20
Adam J Camblin, Emily A Pace, Sharlene Adams, Michael D Curley, Victoria Rimkunas, Lin Nie, Gege Tan, Troy Bloom, Sergio Iadevaia, Jason Baum, Charlene Minx, Akos Czibere, Chrystal U Louis, Daryl C Drummond, Ulrik B Nielsen, Birgit Schoeberl, J Marc Pipas, Robert M Straubinger, Vasileios Askoxylakis, Alexey A Lugovskoy
Purpose: Insulin-like growth factor receptor 1 (IGF-1R) is critically involved in pancreatic cancer pathophysiology, promoting cancer cell survival and therapeutic resistance. Assessment of IGF-1R inhibitors in combination with standard-of-care chemotherapy, however, failed to demonstrate significant clinical benefit. The aim of this work is to unravel mechanisms of resistance to IGF-1R inhibition in pancreatic cancer and develop novel strategies to improve the activity of standard-of-care therapies. Experimental Design: Growth factor screening in pancreatic cancer cell lines was performed to identify activators of prosurvival PI3K/AKT signaling...
March 16, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
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